Car truck



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Patented Jan. 9, 1940 UNITED STATES CAR TRUCK Everett Chapman,Coatesville, Pa.

Application August 23, 1934, Serial No. 741,164

Renewed April 3, 1939 23 Claims.

My invention relates to car truck frames and comprises an improvedconstruction involving the use of rolled plate sections developed intoside members and connecting transoms, which plate sections are securedtogether, by welding or otherwise, to form a unitary structure.

My improved construction involves the production of frame elements whichmay have their principal parts or members substantially in the form ofan I-beam in cross section, and includes a continuous member of specialshape having portions which form a part of the base or what may betermed the lower chords of the side members at the central part of thesame, and transversely disposed portions which form the top or what maybe termed the upper chords of the transoms.

The object of my invention is to provide a unitary structure whosedesign provides maximum resistance to the stresses to which structuresof such type may be subjected.

These and other features of my invention are more fully describedhereinafter; reference being had to the accompanying drawings, more orless diagrammatic in character, in which:

Figure l is a plan View of a truck frame within the scope of myinvention.

Fig. 2 is a plan View of one of the elements of the truck frame.

Fig. 3 is a side elevation of the truck frame.

Fig. 4 is an end view of the truck frame looking in the direction of thearrow a, Fig. 3.

Fig. 5 is a sectional View on the line V-V, Fig. 3.

Fig. 6 is a fragmentary perspective view of a detail of my invention.

Figs. '7, 8 and 9 are enlarged sectional views on the lines VII-VII,VIII-VIII, Fig. 1, and IX-IX, Fig. 3, respectively, of details of myinvention, and

Fig. 10 is a sectional view of a modified detail, which may be said tobe taken on the line X-X, Fig. l.

An essential feature of my invention yis the production of a unitaryframe for car trucks made up of rolled metal sections of the desiredshape, preferably welded together. In the accompanying drawings, I haveillustrated my improvements as applied to one form of truck frame, andit will be understood that the features of my invention may be embodiedin other forms of truck frames without departing from the essentialfeatures thereof.

My improved truck frame includes side members I0, having the usualjournal-box receiving recesses I I, and may carry spring-receivingpockets I2, at one side of such recesses. Substantially centrally of theside members and `ar ranged between the same are transverse elementsconstituting the transoms I3; such transoms-being disposed below theupper plane of 5 said side members.` The several portions of the frameare made of rolled plate sections, preferably welded together to form aunitary structure; the main elements of which may be developedsubstantially into what may be termed 10 I-beam (or box-like) sections.

An important feature of the improved truck frame forming the subject ofmy invention is` the use of a continuous member I5, more particularlyillustratedv in Fig. 2, which member 15 constitutes the central elementof the frame and may comprise longitudinal side portions I5 in parallelrelation which form the base portions or lower chords of the centralpart of the side members I0, and transverse connecting portionsy il,also'in parallel'relation, which constitute the top portions or upperchords'of the transoms I3. The ends of the side portions I6 aredownwardly curved and -flank one kside of the journal-box receivingrecesses II, as indicated at Ita. The 25 member I5 is preferably intheform of a single element of rolled plate metal of the requiredthickness, but it is within the scope of my invention to provide acontinuous member of the shape or substantially the shape shown in Fig.30 2, made of preformed pieces of rolledl metal of the requiredv shape,edge-welded together.

The side members of the frame are made up of plate elements 20 formingupper chords, which may be of the shape illustrated in Figs. 1, 3 and 356;A each of said members 2D extending longitudinally of -the frame inparallel relation and overlying and' being connected to web elements y2| and 22 which, in turn, are secured, as by welding, tov thelongitudinal portions I6 and i611 of 40 the member I5. The members 20have short laterally extending portions 20a on their inner sides` whichare bent over and welded to the transverse portions I'l of the membersI5; such portions 20a with interposed vertical web mem- 45 bers 25,forming knee braces between the side members and the transoms. Shortvertical web sections 25n may be interposed between the top and bottommembers 20 and I6 on the outside of the side members and in line withthe webs 25.

The lower chords of the transoms comprise plate members 39 having theirends 35a curved and-brought into contact with the underside of thelongitudinal side portions I6 of the member I5. The' connecting portionsof. these curved 55.3

CII

ends 58a may be brought into line with the outer margin of the upper andlower chords of the side members, as shown in Figs. 4 and 5, or alignedwith the webs 22 between the upper and lower chords 2li and IG,respectively, as shown in Fig. l0. Between the plate members 30 formingthe lower chords and the transverse connecting portions il forming theupper chords oi the transom members, vertical webs 3| are placed andwelded to the respective members.

The side members are provided with journalbox receiving recesses Il; theinner portion of which includes U-shaped plate elements 32 welded to thevertical plate sections 2l forming part of the web of said side members.The ends of the web members 2l may have curved flangeforming platestsecured to the same to complete the ends of the side members. Y

The spring-receiving pockets i2 may be` carried by the side members i6of the truck frame and, by preference, the portion forming the upperpart of these pockets is surmounted by sections oi bar metal which maybe circular in cross section and welded to the respective web l sections2i and 22 and to the parts forming the upper and lower chords of saidside members.

The ends of the side members may be conneoted together by transverseelements 35 of suitable cross sectional contour which may be wel led tosuch ends and may be disposed substantialiy in the same plane as thetransverse members forming the transorns.

several plate sections which. are assembled to form my improved cartruck frame may be welded together at their meeting points, as indicatedat x, and it will be understood that suchv welding may be eiiected byany suitable means common in the art.

Various modifications may be made in the .foregoing embodiment of myinvention without departing from the spirit and scope thereof as setforth in the appended claims.

I claim:

l.. A car truck frame including side members and a plurality oftransverse members constituting transoms, each of said members beingmade up of horizontally and vertically disposed plate sections weldedtogether and having substantially an li-beam cross-section, the lowerchords of said side members being continuous with the upper chords oisaid transoms.

2. A car truck frame comprising a unitary structure consisting oflongitudinal side members in spaced parallel relation, and transversetransom members in spaced parallel lrelation and` disposed substantiallyat a right angle to the side members, with a continuous plate elementforming the lower part of the side members and the upper part of saidtransom members.

3. A car truck frame comprising a unitary structure consisting oflongitudinal members in spaced parallel relation, and transverse transommembers in spaced parallel relation and disposed' section, with acontinuous element forming the lower chords of the central portions ofthe side members and the upper chords of said transom members.

5. A car truck frame including side members substantially I-shape incross section including upper and lower chords and a connecting web, andtransom members substantially -shape in cross section comprising upperand lower chords and a connecting web dispose-d transversely betweensaid side members, wherein. the lower chord of the side members is anintegral element continuous with the upper chords of the transommembers.

6. In a car truck frame as set forth in claim l, in which the upperchords of the side members have laterally projecting portions bent overand secured to the transom members to form knee braces.

7. A carv truck frame as set forth in claim l, in which the` ends of thelower chords of the transom members are bent into engagement with andsecured to the lower chords of the side members.`

8. A car truck frame as set forth in claim l, in which the upper chordsof the side members have laterally projecting portions bent over andsecured to the transom members to form knee braces, with vertical websinterposed between said bent over portions and the upper chords of thetransom member.

9. A car truck frame having built-up transoms including top and bottomelements and builtnip side members including top and bottom elementsconnected therewith in which the bottom element of the side members iscoplanar with the top element of the transoms and is welded to therespective parts making up such side members and tra-nsoms.

l0. A car truck frame including built-up side members withjoLu'nal-boX-receiving recesses, and built-up transverse members formingtransoms; said transoms having parallel portions forming an integralpart of each of the side members with downwardly bent ends disposedadjacent to the journal-boX-receiving recesses thereof.

1l. A car truck frame including built-up side members with journal-boX-receiving recesses and including continuous upper chords,built-up transverse members forming transoms; said transoms havingparallel side portions forming an integral part of each of the sidemembers with downwardly bent ends disposed adjacent to thejournal-boX-receiving recesses thereof, and connecting members betweenthe upper chords oi the side members and the downwardly bent ends of theside portions oi the transoms.

l2. A car truck frame including built-up side members withjournal-boX-receiving recesses adjacent their ends and includingcontinuous upper chords, built-up transverse members forming transoms;said transoms having parallel hori- Zontaliy disposed side portionsforming the censubstantially at a right angle to the side members; saidtransom members being of beam construction and each including upper andlower chords andconnecting webs; the lower chords of the side membersandthe upper chords of the transom members being comprised of a singleplate. t

14. A car truck frame lcomprising a unitary structure consisting oflongitudinal side members in spaced relation; each of said side membersbeing of beam construction and including' upper and lower chords andconnecting Webs, and transverse transom members in spaced relation anddisposed substantially at a right angle to the side members; saidtransom members being of beam construction and including upper and lowerchords and connecting webs',with the lower chords of the side membersand the upper chords of the transom members composed-oi a singlel plate;the upper chords of the side members having side portions inwardly bentinto engagement with said plate and the ends of the'lower chords of thetransom members being Vupwardly bent into engagement with said plate.

connecting web, and a single plate substantially' horizontally disposedand forming the lower chords of the side members and the upper chords ofthe transom members.

16. A car truck frame having side members including to-p and bottomelements fabricated out of substantially flat plate stockv weldedtogether and connected transoms including top and bottom elementsfabricated out of flat plate stock welded together in which the bottomelement of the side members is coplanar with and forms the top elementof the transoms;

17. A welded car truck frame having a side member including top andbottom elements fabricated out 4oi substantially flat plate stock and aconnected transom including top and bottom elements fabricated out ofsubstantially flat plate stock, in which the portion of the bottomelement of the side members `is integrally coplanar with the top elementof the transom.

18. A welded car truck frame havinga side member including top andbottom elements and a.

y built up of substantially at platel sections welded together andtransverse members built up of substantially fiat plate sections Weldedtogether; said transverse members being 4disposed below the plane ofsaid side members and. constituting 'transoms and each of said sidemembers including a continuous unitary portion integral with an upperportion of each of said transoms.

20. A car truck frame made upof substantially fiat rolled metal sectionsWelded together and including built-up side members and builtuptransverse members disposed below the plane of said side membersrandconstituting transoms; each of said side members including a lowercontinuous and unitary portion integral with a continuous and unitaryupper portion of each of said transoms.

21. A car truck frame including side members and a. plurality oftransverse members disposed below the plane of said side members andconstituting transoms; each of said members being fabricated ofsubstantially flat plate sections welded together and havingsubstantially the contour of an I-beam in cross section and one of thechord members of said side members `*being in the form of a unitaryplate forming a chord `member of each of said transoms.

22. A car truck frame including side 'members and a plurality oftransverse members disposed below the plane ofthe side members andconstituting transoms; each of said members being built-up ofsubstantially ilat horizontally and vertically disposed plate sectionswelded together and having substantially the contour of an :i-

beam in cross section and one of said' horizontal plate sections forminga continuous intermediate connection between the-side members and theplan providing a common chord element vertically intermediate" the ysidemembers and the

